World's oldest known ground-edge stone axe fragments found in Western Australia

A fragment of the world's oldest known ground-edge axe has been found in the remote Kimberley region of northern Australia. The discovery pushes back the technological advance to between 45,000 to 49,000 years ago, and coincides with the arrival of people in Australia. The fragment is 10,000 years older than the previous oldest known fragments found in northern Australia in 2010.